Structures can be analyzed in terms of how they deal with downward forces created by gravity.

人们根据建筑物如何处理由重力产生的向下的力来分析它们。

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Over billions of years, the gas was compressed by gravity into galaxies, stars, plants and eventually, even humans.

在数十亿年的时间里，这些气体被引力压缩成星系、恒星、植物，最终甚至变成了人类。

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The stone rolled down the mountain by gravity.

这块石头由于重力作用而滚下山。

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Newton proved his idea by measuring how much gravity force would be needed to keep the moon orbiting the Earth.

VOA: special.2011.06.01

So，the point is,every object falling under gravity is given by the same formula, but there are many, many objects that can have many histories, all falling under gravity, and what's different from one object and the other object is, when was it dropped, from what height, and with what initial speed.

关键是,每一个受重力作用下落的物体,都有同样的表达式,但是各个受重力作用下落的物体,都有不同的初始条件,所以它们的区别在于,下落时刻,下落高度和初始速度

耶鲁公开课 - 基础物理课程节选

These are all influenced by the gravity of the solar system's largest planet.

VOA: special.2011.02.09

Stars, such as our sun, are giant balls of gas held together by gravity.

CNN: Why gamma-ray burst shocked scientists

As a telescope moves, its mirrors are deformed by gravity while at the same time being shaken by wind.

FORBES: European Southern Observatory (ESO) Sets 'First Light' For World's Largest Telescope

The model Southern is building, the AP1000, is totally new, with safety systems powered by gravity instead of electricity, a so-called passive design.

FORBES: Magazine Article